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tutorial11 - Tutorial 11 By Mi Wengang 04/2007 1 Outline...

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1 Tutorial 11 Tutorial 11 Tutorial 11 By Mi By Mi Wengang Wengang 04/2007 04/2007
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2 Outline Shift register ROM & RAM CPLD & FPGA
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3 Shift Register Register: A collection of 2 or more D-flip-flops with a common clock input. Store a collection of related bits, eg a byte of data in computer. Shift Register: n-bit register with a provision for shifting its stored data by 1 bit position at each tick of the clock. Used for data processing or conversion. Types of Shift Register: » Serial-in Serial-out » Serial-in Parallel-out » Parallel-in Serial-out » Parallel-in Parallel-out Serial-in Serial-out Serial-in Parallel-out
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4 Continue Parallel-in Serial-out Parallel-in Parallel-out
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5 Continue A commercial shift register is 74x194 It is called a universal shift register since it can perform: Shift Left. Shift Right. Load. Hold.
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6 Exercise 1 (1999 Final) Explain how you can construct an 8-bit pseudo-random number generator from 74x194. Draw the resulting circuit diagram.
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